Zeroizing mechanism



Sept. 18, 1951 THOMAS 2,568,523

ZEROIZING MECHANISM Filed Jan. 28, 1948 8 Sheets-Sheet l u; W 6 ll HM (U@y' K.

I rwenlor ARTHUR THOMAS uv Aim? Attorney Sept. 18, 1951 A. THOMASZEROIZING MECHANISM 8 Sheets-Sheet 2 Filed Jan. 28, 1948 F/GZA 5 az os HARTHUR THOMAS 2 441.14;

Attorney Sept, 18, 1951 8 THOMAS 2,568,523

ZEROIZING MECHANISM Filed Jan. 28, 1948 8 SheetsSheet 3 Inventor ARTHURTHOMAS A Horney Sept. 18, 1951 A. THOMAS ZEROIZING MECHANISM 8Sheets-Sheet 4 Filed Jan. 28, 1948 B 7 u 5 I25 3 lllllll 3 I Invunlm"ARTHUR THOMAS J LLALL- Attorney Sept. 18, 195] THOMAS 2,568,523

ZEROIZING MECHANISM Filed Jan; 28, 1948 s Sheets-Sheet 5 4 4 2 4 4 /-46I E 44 Z 43 5 a g I nvenlor ARTHUR THOMAS Attorney Sept. 18, 1951 THOMAS2,568,523

ZEROIZING MECHANISM Filed Jan. 28, 1948 8 Sheets-Sheet 6 Inventor ARTHURTHOMAS u LJILL Attorney A. THOMAS ZEROIZING MECHANISM Sept. 18, 1951 8Sheets-Sheet '7 Filed Jan. 28, 1948 I nventor ARTHUR THOMAS y; 81mg;

A [Jamey Sept. 18, 1951 A. THOMAS ZEROIZING MECHANISM 8 SheetsSheet 8Filed Jan. 28, 1948 Inventor ARTHUR THOMAS JLLXLL Attorney PatentedSept. 18, 1951 ZEROIZING MECHANISM Arthur Thomas, Wallington, England,assignor to Powers-Samas Accounting-Machines Limited, London, England, aBritish company Application January 28, 1948, Serial No. 4,765 In GreatBritain February 3, 1947 9 Claims.

This invention relates to zeroizing means for accumulators having ineach denominational order a resultant wheel which, by its angularposition, indicates the total of the amounts accumulated in the order,and more particularly to zeroizing means especially adapted for use withthe creep-carry accumulator covered in application Serial No. 139,270,which is a division of the present application.

One object of the invention is the provision of means operable tozeroize successively, the several denominational orders of anaccumulator geared to handle amounts in accordance with a variety ofsystems of rotation.

In a preferred construction the restoring means comprises a rotatablezeroizing shaft, means to rotate the said shaft, a plurality of discssecured to the shaft, one disc for each denominational unit, a pivotedlever for each disc, an operating pin extending laterally from each discto cooperate with a slot in its associated pivoted lever to effectoscillation of the lever, an arm for each denominational unit, said armbeing pivoted about the axis of rotation of the resultant gear for theunit, a pawl pivoted to said arm and resiliently held in operativeposition, a plurality of equi-spaced lateral zeroizing elementsextending from the resultant gear for engagement by said pawl, and linksconnecting said arm with the pivoted lever, associated With the unit,said operating pins being disposed in predetermined angular relationshipso that one operating pin engages with the slot in its associated leverafter the next lower denominational unit has been zeroized by itsassociated zeroizing mechanism.

In one construction according to the invention the zeroizing elementsare moved by the pawl against a locating stop, and if desired, thelocating stop may be spring-urged to the position at which it is firstengaged by a zeroizing element during a zeroizing operation and is movedfrom said position by the zeroizing element against the action of thespring to zero position.

Another object of the invention is the provision of means for actuatingtotal indicators under control of the zeroizing means.

The actuating means for the indicators may comprise a toothed wheelcoaxially and angularly movable .with a transmission gear for enteringvalues into each denominational order and connecting means between thetoothed wheel and theindicator whereby linear movement of the toothedwheel is transmitted to the indicator. The connecting means between thetoothed wheel and the indicator for each unit is, in one construction,mounted on a member movable by 2 the restoring means, whereby connectioniseifected between the toothed wheel and the indicator only duringactuation of the restoring means. In this construction each indicator isguided for movement in a straight line path and the connecting meanscomprises a toothed element carried by said movable member andlinkmechanism supported by the toothed element and its associatedindicator and pivotally connected therebetween. The movable member ispreferably actuated by cams on the zeroizing shaft.

Preferably,constructions according to the invention are provided with asafety device to prevent the operation of the restoring means during anaccumulating operation. The safety device in a preferred form comprisesa link slidable relatively to the main drive shaft of the machine towhich the accumulator is fitted and connected with the means forrotating the zeroizing shaft, said link carrying a roller to engage theperiphery of a disc mounted for rotation with said main drive shaft, thedisc having a peripheral aperture with which the roller is aligned toeffect operation of the zeroizing mechanism, a side of said aperturebeing so constructed as to cause the roller to be moved out of theaperture on rotation of said main driving shaft.

In order that the invention may be clearly understood two embodimentsthereof will now be described, by way ofexample, with reference to'theaccompanying drawings in which:

Figure l is a side elevation, partly in section, of a statisticalmachine having the invention applied thereto,

Figure 2a is a plan'of part of the accumulator mechanism indicatedgenerally in Figure l by the reference letter A, the denominationalorder units being shown diagrammatically,

Figure 2b is a continuation of Figure 2a joining that figure on the lineII--II,

Figure 3 is a side elevation of one of the counter units, some parts ofthe figure being broken away to show the integers normally hidden behindsuch parts, the units illustrated being one employed for tens orhundreds of pounds,

Figure 4 is a plan of the counter unit shown in Figure 3,

Figure 5 is a perspective View of the carry-over mechanism for one ofthe counting units, the parts being shown diagrammatically and inpartial exploded disposition,

Figure 6 is a section through the differential gearin Figure '7 is aperspective view of a detail showing compensating mechanism formaintaining a figure on an indicator wheel in reading position,

Figure 8 is a side elevation of the unit employed for counting pence andhaving connected therewith the zeroising mechanism, and

Figure 9 shows a detail of the mechanism illustrated in Figure 8,

Figure 10 is a side elevation of modified form of the accumulator unitshown in Figure 3,

Figure 11 is a perspective view showing a portion of a machine havingseveral accumulator units in position and some parts omitted forclarity, in this figure the foremost unit shown is that for the units ofpounds, and,

Figure 12 is a side elevation of the tens of shillings carry-over wheelemployed in the construction shown in Figures 10 and 11.

In the accumulator about to be described, the record cards from whichdata is sensed, will be assumed to be punched to record amounts inshillings and pence but the accumulator will register a total in pounds,shillings and pence. For example, a sum of 83 shillings and 9 pencesensed from a record card will be registered in the accumulator as 4pounds 3 shillings and 9 pence.

Referring to Figure 1, the machine shown therein comprises a statisticalmachine by means of which sterling amounts, in shillings and pence asindicated above, sensed from perforated record cards are transferred toaccumulator mechanism, as indicated by the reference letter A, at arelatively high speed and are registered therein in pounds, shillingsand pence. As shown diagrammatically in Figure '2a, the accumulatormechanism comprises the following denominational order sections; a penceunit P, a shillings unit S, a tens of shillings unit SI, a pounds unitL, 'a tens of pounds unit L|, a hundreds of pounds unit L2, and athousands of pounds unit L3.

The machine, and the mechanism for operating the accumulator wheels ofthe accumulator mechanism is described in British patent application No.26,189/45 (Serial No. 600,983) and only a brief reference to the majorfeatures thereof will be made herein.

The machine shown in Figure 1 consists of a record card magazine ID fromwhich cards are fed beneath sensing pins mounted in a reciprocating pinbox |2, the pin box being reciprocated by a lever l3 and eccentric 4driven from the main drive shaft |5 of the machine. The pins, shouldthey pass through perforations in a record card, transfer theinformation so sensed to flexible cables l6 which in turn operateplungers These plungers cause pins on pivoted arms, not shown, to beprojected through apertures I8 in a plate l9 and a pin so projectedthrough the plate l9 engages the tail 20 of a latching member for a pawl2| to be tripped and so release the pawl 2| to engage with the ratchetteeth of an accumulator wheel 22. An accumulator wheel 22 is associatedwith each of the indicator wheels described below.

To the rear face of the accumulator wheel 22, as viewed in Figure 1,there is secured for rotation therewith a driving gear wheel 23, thisgear wheel meshing with an idler gear wheel 24.

From this point it will be convenient, for the present, to ignore thepence unit as there is no lower denominational order unit from which acarry-over is effected to the pence unit and this unit therefore differsslightly from the remaining units all of which are similarlyconstructed.

Reference to the construction of the pence unit will be made later.

In each of the units, which represents a single digital column, theidler 24 meshes with peripheral teeth on a differential cage 25, Figures3, 5 and 6. The cage 25 is riveted to a flange 26a, Figure 6, on aspindle 2B which is rotatable in frame plates 21, 28. On one side of thecage 25 is a driving gear 29 freely rotatable on the spindle 26 andmeshing with a resultant gear 30 which, as will become apparenthereinafter, indicates by its angular position the total of the inputand carry amounts accumulated in the denominational order of which it isa part, but which, in order to make said total visible, in turn, meshesWith an indicator gear 3| secured to an indicator wheel 32 mounted forrotation on a spindle 33 carried in a bearing arm 34 pivoted at 35 tothe frame plate 21 (see also Fig. '7).

Rotation of the cage 25 by the idler 24 ef-' fects rotation of thedriving gear 29 and the resultant gear 3|] as described below. Thedriving gear 30, however, has twice the angular movement of the cage 25and to neutralise this the resultant gear and driving gear are given a2:1 reduction, whereby a driving feed of one tooth on the accumulatorwheel 22 rotates the resultant gear a distance of one tooth. As the gear3| is provided with twenty teeth and the indicator Wheel beingconsidered has two sets of ten characters thereon a feed of one tooth onthe resultant gear 30 results in a feed of one character on theindicator wheel 32.

The' resultant gear 3|l is coupled with the first gear 36 forming a partof a train of reduction gearing associated with the next higher unit.Connection between the said resultant gear 30 and the gear 36 iseffected by a resultant member 3'! projecting laterally from theresultant gear 30 and engaging in a slot 38, Figure 5, in a flange 39carried by said first gear 36. Thus as the resultant gear 30 rotates acorresponding angular movement is imparted to the first gear 36 of thetrain of reduction gearing.

The train of reduction gearing includes an idler 4|], and a gear 4|freely rotatable on the spindle 26 and mounted for simultaneous rotationwith a second sun-gear 42 engaging with a planetary pinion 43 of saidnext higher unit.

and 41, Figure 3, positioned in an annular bear'-' ing member 48 securedto the cage 25. As can be seen from Figure 4, that part of the member 48which supports the pinions 43 and 44 is set away from the face of thecage 25 and the pinions 43 and 44 extend into apertures 49, 50, Figurehas twenty characters, two peripheral steps is' escapes.

engages the arm 34 of thenext highertunit; see

Figure 7. By this means; as the indicator wheel is rotated: and thecarry-over :is. afiected to the next higher unit, the cam 5| graduallyrocks. the: bell-crank 53 about its pivot: 54 'andthetpin .55' rocks-thearm 34"of the next higherunit baclz wards by the same distance asatheinexts-higher' indicator has been rotated due to 'thezcarryeover thus theregistered. character on: :the' said'next' higher unit remains inreading position during the passage of the indicator Wheel of lowerorder between and 9 whereupon the roller1=52 dropsover the step'on thecam so-that*thef pin 55 suddenly disengages the arm 34 of the nexthigher unit' and the said arm" 34 dropsone tooth spaceof 'the gear 3! topresent to reading position-.the next succeeding" character on theindicatorwheel of the next higher unit.

As stated above; the pence unit difiers slightly from'the foregoingdescription due to thefact thatv it is not associated with a unit oflower order. In the construction of the pence unit, therefore, no gear36 and idler 40'- is provided and the gears 29-and 25 comprise acompound idler. Also the indicator gearhas twenty=four teeth as theindicator wheel has twenty-four: characters, two sets of 0 to 11. But.=for these modifications the foregoing description' apper-i taining tothe units of higher orders appliesals to the pence unit.

It will, of course, beappreciated-thatthe reduction' obtained by thecarry-over train ofreducti'on gearing will not be the" same for each: ofthe units as the reduction obviously depends on thevalu'esbeingregistered on the particular unit. Thus, the carry-overreduction fromthe pence tothe units of s'hilli'ngssection" givesa 6:1reduction, fromthe units of shillings'to the tens of shillings sectionthe reduction-"is 5: 1, from the tens of'shillings to the unitsof poundsthe reduction is 1:1, and each of the remaining. pounds sections has acarry-over reduction of 5:1.

To reset-the indicator wheels to zero-it is nee-- essary to reset eachunit in turncommencing with'the lowest denominational-order unit, thatisthe pence'unit, and then, successively, each succeeding higher unit;Forthis purpose each resultant gear 3| is provided with a plurality'. ofequi-spaced lateral zeroising pins'56; the spacing between the pinsbeing'equalto-the number-0f characters in a set on the.particularindicator' Wheel. Thus, for the units of's'hillingswheel, thepins are located ten tooth spaces apart while on the pence resultantgear the pinsare locatedtwelve tooth spaces apart."

An arm 5'! is mounted to swing freely on a boss- 58; Figure 5, of theresultant gear-30 andcarries' a pawl 59 (see also Fig. 3) pivotedtheretoat -60. A spring 6| retains the pawl in position to'engage a pin'56 onthe gear 30.

During an accumulating i operation l the. resultant gear-30 rotatesanti-clockwise, Figure 3, and the pins 56 move the pawl 59 againsttheaction of the spring GI 50- that the pins pass th'e pawl.-

When, however, the indicator wheel *is be: zeroized, the pawl is movedinan anti-clockwise: direction, as viewed in Figure a, 'untili't-engages:

one of .thetzpinsrific Theupzaiw-lttheirncontinuesssto thezendof itsoperative stroke;:moving .the: pin

so zenga'gei: and :the indicator :"wheel is rotated until 0 appears inthe reading-position.

Operation ofathezpawlxillzis effected by *a link 62=CODI16Ct6dIatoneJend'. to 'the'swinging'arm i 5 1 and T. at; thetopposite tend to}a connectingxlinkfiii whichis, in'turmioonnected.toa lever fi4 mountedon'a spindle 65 carried-=insframes BB'andBIQFigure;2b..:" The lever64'has: two: curved peripheral portions'68' and 69 (Fig. 8) to engage" the:periphei eryiofia locking-plate 10 secured t'oia spindle H'alsoicarriedinthexframes 66'and'61'."

To 'OIIBTBIld of'thetspindle -1.l is secured a gear 12; Figure zb,which; meshes with a larger'rgear l3 mountedona stubsha'ft T4. intheirameslifi; A handle. 15 is secured :to' the gear: I3 and:.orr de4DIESSiOIIL of the. handle the. spindle." 'is rotated. carrying." with ita disc 16 having a. lateraloperating; pin 11 secured-thereto, :andthe'lockingplate .10; Duringrthismovement the curvedpe toi withdraw.from the s1otr18 and" the curved peripheral portion 69 of the'lever'flisengaged by the peripheral "surface of the: lockingi'plate as: shown inFigurer9.

To prevent: over-running .of :the resultant gear 30; due to the highspeed" at'which thezpawlil is operated, a locatingplate T9 is secured toithef' link-62 and is moved. thereby into the path-of thetpirr 56 next"succeedingthe'pin engaged by:

( the...pawl'.

FromeFigure 12b it will be'rseen thatthe'operatingrpins; 11 for "the:different units are disposed at successively diflerent angularpositions; The angular disposition of these pins'is so selected that onepin becomes operative immediatelyithe' next :Lpreceding pin hasefiected'the zeroising of its-associated indicator wheel. The selectionis also 'so made that all of the pins become successively operativeduring an angularmovement ofle'ss than-90 degrees of the gear 1-3. 1

To ensure that=the re-setting' handle 15 is operatedonly when themachine is at rest a safety device is provided. This device comprises alink ;"1one end of whichis pivoted at'8l to the gear13'. The oppositeend of the link 80 has a s1ot 82 which slides on-the block 83 looselymounted on the main shaftrl5 of the machine. Secured :tothe main shaftl5, forrotation therewith is a disc 84shaving a gap 85, Figure 8. A pinprojects laterally from the link 80 and engagesthe periphery of the.disc 84 and while the pin 86"is in engagement with the periphery: of-thedisc the handle 15 cannot be depressed.

To. efiect a ree-setting: of the indicatorwheels, the pin 86.must. bealignedw'ith thegap' 85 in the disc 84 and should an attempt bemade :todepress the handle while the machine is running the. only.result: will'be that the handle willfbe knocked up-dueto the pin riding up thesloping side 81-of the gap 85.: Thisefiect will, of course, also beobtained if an attempt is made to hold the. handledowir when starting upthe machine.

The operation; of'the units of the accumulatormechanismwilhnow"be."described-withreference to the unitsor:po1.znds:unit; the;tenssofzipounds.v

7 unit, and the hundreds of pounds unit, it is, however, to beunderstood that the other units of the mechanism also operate in themanner about to be described.

First, let it be assumed that the values 3, 5, and 7 are beingregistered in the tens of pounds unit, which is initially set at zeroand that no carry-over is being efl'ected from the units of poundscolumn. In this case, the pawl 2|, Figure 1, first feeds the accumulatorwheel 22 a distance of three teeth and the driving gear 23 and idler 24are turned through corresponding angular distances. The gear 4| betweenthe tens of pounds unit and'the units of pounds unit is held againstrotation by the resultant gear of the unitsof pounds unit, thus theangular move-" ment of the idler 24 of the tens of pounds unit istransmitted thereby to the cage 25 meshing therewith and thence throughthe first sun-gear 45,'the'gear 29 and resultant gear 30, the gear 3I1is turned three teeth so thatthe tens of pounds indicator registers a 3.During the rotation of the-cage 25 the planetary pinion 43 rotatesfreely round the sun-gear 42 meshing therewith and the pin 31 on theresultant gear 30 of the tens of pounds unit rotates the flange 39associated with the first gear 36 of the hundreds of pounds unit so thatthehundreds of pounds indicator wheel is moved from to 0.3. Due,however, to the action of the compensating cam on the tens of poundsindicator wheel and its associated bellcrank 53, as described above, the0 registered on the indicator wheel of the hundreds of pounds unitremains in reading position. The rotation of the indicator wheel of thehundredsof pounds unit is eiiected through the train of reduction gears40, 4| and 42 of which the gear 36 is the first gear and the last gear42 rotates the planetary. pinion 43 of the hundreds of pounds unitdifferential. planetary pinion 44 and this, in turn, rotates thesun-gear 45 which, being coupled with the gear' 29 of the hundreds ofpounds unit, effects rotation of the indicator wheel of the hundreds ofpounds unit.

When, during the next cycle the value 5 is en-' tered, the gears operateas just described but with the result that the ,tens of pounds indicatorwheel is rotated a further five teeth to register an 8 in the readingposition and the indicator,

wheel of the hundreds of pounds unit is turned from 0.3 to 0.8 but the 0remains in the reading position.

Durin the third cycle, the gear 3| on the in-- dicator wheel of the tensof pounds unit is turned a further seven teeth with the result that theindicator wheel is turned to register a 5 in the wheel registers a 1 inthe reading position. At

the end of the cycle, when the 7 has been registered and the 5 appearson the tens of pounds indicator 'wheel in the reading position, the indicator wheel of the hundreds of pounds unit shows a 1 in the readingposition but actually registers 1.5.

Let it now be assumed that the indicator wheel of the tens of poundsunit registers 3 and that a 4 is being registered simultaneously with acarryover from the units of pounds unit.

The pinion 43 rotates the otherpounds unit with the result that theangular I velocity of the gear 29.is momentarily increased and-a 5 isregistered on the tens of pounds indicator wheel instead of a 4. Thus,the number registered in the reading position on the indicator wheel ofthe tens of pounds unit at the end of this cycle is 8 and 0.5 is carriedover to the hundreds of pounds unit as previously described.

Referring now to Figures 10 to 12 the modified construction showntherein is similar to that described above and like parts are indicatedby the use of like references. In this construction there is providedfor each denominational unit a fiat indicator member I00 havingcharacters engraved or otherwise formed thereon and disposed one abovethe other to indicate numbers registered in the particular unit. Theseflat indicator members are mounted between guides IOI, I02 so as to bemovable in a straight line path therebetween and preferably theindicator members are disposed to be movable in a vertical plane. By soarranging the vertical indicators it is possible, when atotal is taken,to sense either the upper'or the lower ends of the indicators and asa-result of such sensin operation to actuate printing or punchingmechanism which will provide either a printed record of the total takenor punch a record of the total in a statistical record card.

Theactuating means whereby the indicators are moved in their verticalpath consists of a toothed wheel I03 which is co-axial with the transfergear 24, see Figure 10, and a toothed element I04 which is mounted forangular movement on a bar I05 movable lengthwise on actuation of thezeroising mechanism associated with the accumulator. The toothed elementI04 mounted on the movable bar I05 is connected with the indicator I00of the unit by a pair of links I06, I01, of which the link I06 isconnected with the toothed element I04 and the link I0'I with theindicator I00. The inner ends of the two links are pivotally connectedat I08 so that as the toothed element I 04 is turned on engagement withthe teeth of the toothed wheel I03 the links I06, I01 impart to theindicator a linear movement equal to the linear movement of the toothedwheel so that the appropriate number appears on the indicator at theviewing position.

The movable bar I05 on which the toothed element I04 is mounted isoperated only when the A face of the gear 30 is provided with lateralvzeroising pins 56 and pivoted at I09 to the lower end of the arm 51a isa pawl 59a which, in contra-distinction to the construction abovedescribed is arranged to move the gear 30 in a clockwise direction. Thepawl 50a moves the zeroising pins 56 against a locating stop III]pivoted at III to the frame of the machine at a position above2,&6.8,5.23,

the. axis pf rotation of the gear 30, and the stop 4 III) isurged by aspring II2 into position to be engaged by a pin 56. The underside of thelocating stop is arranged during a zeroising operation to abut against afixed ping-I I3 extending later..- ally .fromthe frame ;of the machineDuring an accumulatin operation, the. stop; I I is lifted about its,pivot I I] bythezeroising; pins 56 which are thenmovinginuan;anti-clock? wisepdirection as viewed. in .Figure, 10.,However,. 10 to ensure that when the gear 30 .is in a 19. posh: tion thestop I I 0 is restingon the top of .a pin- 56,11. the, stop is providedwith a slot H4 sQthatJt can... slide. lengthwiserelative toits pivot..-III. The; spring. I.I2 urges the stop to the positionshown in 5 Figureand duringa zeroising Operation. it is in thisposition when its.endaface, I Idais first ,en.-.. zed by. a zeroising. pin .moving in. acl ckwise direction. The pin. .56 then; ..mo v,es the stop. t lengthwiseuntilthepawl; 5.9a.ceasesw to move thetzo pin.

Mounte ate ch end e:sp ndlell:.is a cam. These cams .e aee.i0l wersllfimountedm on levers III pivoted athljfito the icle frames.the.-machine. The levers II'I are. conne cted by 5 an ang le .bar. I.I 9and thiS;.b a1. supports. 1 1 I o .Which are. c nnected; linksl 2 I tcouple the... yokes .with the movable. .bars ;l,05;

On actuation .of .thchandle .15 thcmcamsil I5. rock; .the. links. I I1about the pivots ,I I8 thereby. moving the bars I.05-,lengthwise.sothatthe teeth f the, toothedjlemflhtsdlfil which are.;.carr,ied.;.thereby engage and meshyyvith the. .teeth. of the; toothed wheels .I03... The .movable bars. I 05 also. eachxeach carry an. abutment.-l22.which,.;.on 35. l thwi e. movement of. .the..bar J05. to inter-w. en a eaid t th-engages. a projection I23 iormed,;. on .a. locking pawl 1.24for the accumulator wheel. 22 associated therewithtotripthe lockingpawl;

I 24 out of engagement. .with the. .accumulator.;. 4 o r wheel so thatthe latter.-may...be:.-rotated in a re-... ve se direction. .Tlhelocking .pawlclzl. normally. operates. to prevent. ,rotationof the.accumulator wheel 22 in an anti-:elockwise direction.

To prevent rotationof the accumulatoruwheele 22 in aclockwisedirectionduring.zeroising .of.tlie. accumulator a secondlocking pawl, I.25.is pivot: y m unt d onthe.rightehandssideof theacculaor wheel 22,v a ..vi wed inFigurciOand is..- urged b a p n 6-towardsthe. teeth of theme cmnu r whee Normally...h wever,.-the s c-.5;- 0nd.lock pawl 125. is held out of ,enga ementh withthe accumulator wheelby-a pin] 2'I-,project-' ing laterally from themovablebar l05. Onactuationof the handle 15 torelease the first'lock.- -5.g ing pawl I24 thespring I 26 causes...the second... pawl I25 to engage withtheaccumulator wheel In operation, on actuation of the; handle J54; in aclockwise direction, as viewed in Figuretlo, the accumulator wheels 22are,during.:the. -initial. movement of the handle, restrained against.movement in clockwise direction, as .above de: scribed, and areconditioned to be rotated in ;,an.; anti clockwise direction. Thetoothed elements; I04 mounted on themovable. bars I05 are moved intomesh with the teeth of thee-toothed wheels; I03 .which are co-axialwithand mounted for angularmovement with thetransfer members 24. Themovement of the bar I05 also causes a trip lever 59b, Fig. ,11, which iscarried'on bar.I05 to rock clockwise, about its pivot-pin 590 which; isfixed to frameplate 21 so that a trip. pin 59d i s moved out ofengagement:with,the;tail;;ofpawl:v 59a .-this..pawl then b inrestoredibyi its sprin GI =intogll e pathrof theyzer nen ns fi. Con--;.-

tinued; movement; f ;the:. handle. 15 causes the 1ink162a ofthe first.unittocoscinate itsgassociated i. arm 51a so that ther,paw1;159a: ismoved ina 1 clockwise direction, engagesrthe first-zeroisingpin. 56disposed inits. path of movement and rotates;

the.-resultant.gear..30 in a clockwise direction through a distanceequalito *thenumberof teeth by which the carry-over gear. hasbeenadvanced from the zero positionduring the preceding accumulatingoperation. As the zeroising pins 56 are equi-spaced eachofthe pinsuiscorrespondingly moved, andthat pin which is next approaching the zerostopHIIB. is moved into engagement therewith. The angulanmovemnt of theresultant wheeled due to the action of the pawl 59a is transmitted tothe differential to which it' is directly geared and also to thetrain-of reduction gearing between it and the next higher Idenominational unit so tha't a reverse--move- I ment is imparted to eachof these integers. As

stracted therefrom by the reverse rotation'of the cage; thus the firstunit is zeroised and the carry over to the next higher unitsimultaneously removed therefrom so that during the zeroising of saidnext higher unit there remains. in that unit only a complete wholenumber as set up on the" cage 25 thereof to be zeroised.

On actuation of'the" next succeeding lever 64" to zeroise the nexthigher unit the whole number represented thereon is zeroised and duringthis operation the carry-over registered in the next. higher unit issimultaneously]. cancelled as, just. described with reference .to the.zeroising of the first unit.

During the, reverse angular movement of a cage 25 to move it to a zeroposition, the toothed element lfil which engages-with the toothed.

wheel I03 co-axial with the transfer gear Hassociated with the cage isturned bythe number of teeth corresponding to the-numberof teeth by. lwhich the cage is moved in the reverse direction; to the zero positionand thelinearmovement thus transmitted to the toothed element Ind-istranslated. through the pivoted links iufi lfll to the verticallymovable indicator I00 so that a number corresponding to=the number .ofteeth, by which the cage is movedin the reverse direc tion appears onthe indicator at the viewing position I28. Thus-the denominational unitsare successively zeroised and-at the end of the zero-r ising operationthe indicators, I00, due to .the relative positions they then: occupyrelative to their zero positions, indicate the;total inscribed".

in theaccumulatorduring thepreceding accumulating operation. This total:is visible at theviewing position I28 and the indicators I!!!) aredisposed at varyingheights accordingtmthe. positions to which they havebeen moved from their zero positions.

It will be appreciated that although therdeei nominational unitsstartingwith the: lowest unit,-:: are zeroised successively, the; entire.zeroising. op:- 1

eration .is effected during the clockwise-move-' ment of the handle 15and the total inscribed on the indicators I00 at :the viewing positionI28 remains visibleonly until theghandle 15 is moved:

anti-clockwise to return it to its normal position.

On the return movement of the handle I5 the toothed elements I04 aremoved out of engagement with the toothed wheels I03 and all of theindicators I are returned to the zero position.

The toothed element I04 which engages with the toothed wheel I03co-axial with the transfer gear. 24 is shown in the drawings as atoothed wheel, but as only a limited number of teeth are required forengagement with the toothed wheel I03 associated with the transfer gear,the toothed element I04 may, if desired, comprise a segment with whichthe links I05, I01 communicating with the indicator I00 are connected.The teeth on the toothed wheel and toothed element respectivelypreferably have pointed profiles to facilitate their engagement when themovable bar I05 is actuated to bring the toothed element I04 into meshwith the toothed wheel I03.

The number of teeth on the toothed element I04 need only be the same asthe number of characters on the indicator associated therewith. Thus,for example, if the indicator is provided with numerals 0 to 9 inclusive10 teeth must be provided on the toothed element, but it is preferred,for constructional purposes, to provide two or three extra teeth on eachside of the 10 teeth actually employed for actuating the indicator.

When the accumulator is constructed to register sterling amounts thedenominational unit for registering tens of shillings is preferablyprovided with a resultant gear 30 having on the side thereof, instead oflateral zeroising pins 56 above described, ratchet-shaped teeth I29,Figure 12, to be successively engaged by a locating stop IIO so that theresultant gear for this unit can be moved only one tooth pitch at a timeand thus only remove the partial carry-over, which in this case neverexceeds 1 tooth pitch.

In each of the embodiments of the invention described above there hasbeen provided a locating stop against which the zeroising pins 56 abutduring a zeroising operation. These stops, however, are necessary onlywhen, as described above, the zeroising operation is effected by asingle arcuate movement of the handle l5. If the zeroising operation iseffected more slowly as by the complete rotation of a handle for severalsuccessive turns, the locating stops may be dispensed with.

In one way of effecting the zeroizing operation slowly, a gear wheelidentical with the wheel I3 is mounted on the spindle II and meshes witha small gear identical with the small gear 12 mounted 'on the stub shaftT4. The handle is in this instance mounted on the small gear on the stubshaft I4.

It will be appreciated that although manually operated mechanism isdescribed above for zeroising the accumulator, mechanical means may, ifdesired, be provided to effect actuation of the zeroising mechanism.Such mechanical means can be controlled in known manner from a controlhole in a statistical record card, the control hole being sensed by aspecial sensing pin II to actuate the zeroing mechanism. Thus, at theend of a series of record cards having recorded values to be added intothe accumulator, the zeroising mechanism would be operated through themedium of the special sensing pin passing through the control hole andthe total inscribed in the accumulator would then be transferred to theindicators I00 for a short interval of time, during which the indicatorscould be read by the eye and, if desired, engaged by sensing fingersforthe purpose of actuating printing" mechanism, or by punchingmechanism adapted to perforate a record in a record card.

I claim:

1. In a zeroizing device for an accumulator having in each orderaresultant gear which by its angular position indicates the total of theamounts accumulated in the order, a, zeroizing shaft, means to rotatesaid shaft, a plurality of discs secured to the shaft, one for eachdenominaeach said arm being pivoted about the axis of rotation of theassociate resultant gear, a pawl.

pivoted to each said arm, a plurality of equispaced lateral zeroizingelements extending from each resultant gear for cooperation with theassociate pawl, and connections between each said 7 arm and itsassociate lever.

2. In a zeroizing device for an accumulator having in each order aresultant gear which by its angular position indicates the total of theamounts accumulated in the order, the combination of a plurality ofequispaced lateral zeroizing elements extending from each resultantgear, an arm pivoted about the axis of rotation of each resultant gear,a pawl pivoted to each said arm and adapted to engage one of saidelements and rotate the associate resultant gear from the position towhich it has been advanced to a zero position, a zeroizing shaft, meansto rotate said shaft, a plurality of discs secured on said shaft, onefor each denominational order, an operating pin extending laterally fromeach disc, a slotted pivoted lever associated with each said disc andactuated by the associate pin entering the slottherein, each said pinbeing spaced a different distance from its slot, and connections wherebyeach lever actuates its associate arm and pawl.

3. The combination of an accumulator having in each order a resultantgear which by its angular position indicates the total of the amountsaccumulated in the order, with a zeroizing device comprising a zeroizingshaft and means to rotate it, and, in each order a disc secured on theshaft, an operating pin extending laterally from the disc, a slottedpivoted lever actuated by said pin entering the slot therein, each saidpin being spaced a diiferent distance from its slot, an arm pivotedabout the axis of said resultant gear, a pawl pivoted to said arm, aplurality of equispaced lateral zeroizing elements extending from saidresultant gear and engaged by said pawl to rotate said gear from theposition to which it has been advanced to a zero position, andconnections whereby said lever actuates said arm.

4. In a machine of the class described having a drive shaft, and anaccumulator including in each order a resultant gear which by itsangular position indicates the total of the amounts accumulated in thatorder, an accumulator zeroizing device operable when the machine is atrest and comprising a zeroizing shaft, means to rotate said shaft, 2,disc secured on the shaft, an operating pin extending laterally from thedisc, a slotted pivoted lever actuated by said pin entering the slottherein, an arm pivoted about the axis of rotation of the resultantgear, a link connecting said arm and lever, a pawl pivoted to said arm,a plurality of lateral zeroizing elements extending from said resultantgear for cooperation with said pawl in rotating the resultant gear froman advanced position to a zero position, a member sli'dable relativelyto the drive shaft, a roller on said member, a disc on the drive shaftengaged by said roller to prevent sliding movement of the member buthaving a peripheral aperture into which the roller can be moved in therest position 01 the machine to permit sliding movement of said member,one side of said aperture being so formed as to cause the roller to bemoved out of the aperture on rotation of the drive shaft, and connectingmeans between said member and the zeroizing shaft to prevent rotation ofthe latter when sliding movement of the former is prevented by the lastmentioned disc.

5. In a zeroizing device for an accumulator having in each order aresultant gear which by its angular position indicates the total of theamounts accumulated in that order, the combination of a zeroizing shaftand means to rotate it, and in each order a disc secured on the shaft, azeroizing pin extending from the disc, a slotted pivoted lever actuatedby said pin entering the slot therein, an arm pivoted about the axis ofrotation of the resultant gear, a linkage connecting said lever and saidarm, a pawl pivoted to said arm, a plurality of lateral zeroizingelements extending from the resultant gear for cooperation with saidpawl in restoring the resultant gear to a zero position, and a zero stopresiliently held in a position slightly in advance of zero against whichsaid zeroizing elements are moved by said pawl and which is moved bysaid elements to zero position.

6. In a zeroizing device for an accumulator having in each order atransmission gear by which amounts are entered into the accumulator anda resultant gear which by its angular position indicates the total ofthe amounts accumulated in that order, the combination in each order ofan arm pivoted about the axis of rotation of the resultant gear, a pawlpivoted to said arm, a plurality of equi-spaced lateral zeroizingelements extending from the resultant gear for cooperation with Saidpawl in restoring the resultant gear to a zero position, a zeroizingshaft common to all the orders and means to rotate it, means in eachorder actuated bysaid shaft to operate said arm and pawl, a linearlymovable total indicator, normally disabled connecting means between thetransmission gear and the indicator whereby the restoring movements ofthe resultant gear are transmitted to the indicator, but disabled duringaccumulating operations, and means actuated by said zeroizing shaft toenable said connecting means.

7. In a zeroizing device for an accumulator having in each order atransmission gear by which amounts are entered into the accumulator anda resultant gear which by its angular position indicates the total ofthe amounts accumulated in that order, the combination of a zeroizingshaft and means to rotate it, and in each order an arm pivoted about theaxis of rotation of the resultant gear, a pawl pivoted to said arm, a,plurality of equi-spaced lateral zeroizing elements extending from saidresultant gear for cooperation with said pawl in restoring the resultantgear to a zero position, a disc on the zeroizing shaft, an operating pinextending from the disc, a slotted pivoted lever actuated by said pinentering th slot therein, connections for said lever to actuate saidarm, a linearly movable total indicator, connecting means between saidtransmission gear and said indicator whereby the restoring movements ofthe resultant gear are transmitted to the indicator, but disabled duringaccumulatingoperations, and means actu ated under control of saidzeroizing shaft to enable said connecting means.

8. In a zeroizing device for an accumulator having in each order atransmission gear by which amounts are entered into the accumulator anda resultant gear which by its angular position indicates the total ofthe amounts accumulated in that order, the combination in each order ofan arm pivoted about the axis of rotation of the resultant gear, a pawlpivoted to said arm, a plurality of equi-spaced lateral zeroizingelements extending from the resultant gear for cooperation with saidpawl in restoring the resultant gear to a zero position, a zeroizingshaft common to all the orders and means to rotate it, operativeconnections between said shaft and said arms to rock the latter seriatimbeginning with the arm of lowest denominational order a total indicatorguided for movements in a straight line path, a tooth wheel coaxial andangularly movable with said transmission gear, a member moved undercontrol of said zeroizing shaft, a toothed element supported for angularmovement on said member and moved thereby into mesh with said toothedwheel during zeroizing operations, and link mechanism connecting thetoothed element with the indicator.

9. In a zeroizing device for an accumulator having in each order atransmission gear by which amounts are entered into the accumulator anda resultant gear which by its angular position indicates the total ofthe amounts accumulated in that order, the combination of a zeroizingshaft, one or more cams thereon, means to rotate the shaft, and in eachorder an arm pivoted about the axis of rotation of the resultant gear, apawl pivoted to said arm, a plurality of equi-spaced lateral zeroizingelements extending from said resultant gear for cooperation with saidpawl in restoring the resultant ear to a zero position, a disc on thezeroizing shaft, an operating pin extending from the disc, a slottedpivoted lever actuated by said pin entering the slot therein,connections for said lever to actuate said arm, a total indicator guidedfor movements in a straight line path proportional to the distancesthrough which the resultant gear is restored, a toothed wheel coaxialand angularly movable with said transmission gear, a member moved bysaid cams, a toothed element supported for angular movement on saidmember and moved thereby into mesh with said toothed wheel duringzeroizing operations, and link mechanism connecting the toothed elementwith the indicator.

ARTHUR THOMAS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,508,762 Bacon Sept. 16, 19241,517,412 Doerr Dec. 2, 1924 1,596,566 Wheeler Aug. 17, 1926 1,853,054Horton Apr. 12, 1932 1,913,983 Gardner June 13, 1933 2,060,703 TurckNov. 10, 1936 2,214,029 Mixer Sept. 10, 1940 2,265,628 Chase Dec. 9,1941 2,309,901 Hogfors Feb. 2, 1943 2,360,615 Mixer Oct. 17, 19442,428,084 Lambert Sept. 30, 1947 2,453,342 Rast Nov. 9, 1948

